Probability - Breaking up an event into unions of complements

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SUMMARY

The discussion centers on the probability of events A, B, and C within a sample space. It clarifies that the equation P(A) = P(ABCCC) + P(ABC) is correct, as it represents the union of the complements of the events. The confusion arises from misunderstanding how to break down the probabilities of overlapping events. The correct interpretation emphasizes the importance of recognizing the distinct outcomes represented by the events.

PREREQUISITES
  • Understanding of basic probability concepts
  • Familiarity with event notation in probability
  • Knowledge of unions and complements in probability theory
  • Ability to interpret sample spaces
NEXT STEPS
  • Study the principles of probability theory, focusing on unions and intersections of events
  • Learn about conditional probability and its applications
  • Explore the concept of sample spaces in more depth
  • Review examples of overlapping events and their probability calculations
USEFUL FOR

Students of mathematics, educators teaching probability, and professionals in fields requiring statistical analysis will benefit from this discussion.

IniquiTrance
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Why is it that given 3 events, A, B, and C describe a sample space, then:

P(A) = P(ABCCC) + P(ABC)

Shouldn't it be:

P(A) = P(ABC) + P(ABCC) +P(ABCC) +P(ABCCC)

Thanks!
 
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Hi IniquiTrance! :smile:

Yes.
 

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